490 GOUlESOCIDiE. 



Si/nojysis of the Genera. 

 * Tlic posterior divhion of the adhesive disk without free anterior margin. 



Three gills and a half ; gill-membranes attached 



to the istliniua 1. CiioHisocmsMUS, p. 41.10. 



Three gills; gill-membranes free. Both jaws 



witli a single series of incisors 2. Sicyases, p. 494. 



Three gills; gill-membranes free. None of the 



jaws with incisors 3. (Jotvli.s, p. 497. 



Three gills; gill-membranes free. Several series 



of teeth in the upper jaw, and incisors at 



least in the lower 4. Gobieso.v, p. 499. 



** The posterior portion of the adhesive disk with a free anterior margin. 



Tliree gills ; gill-membranes free. Incisors in 



both jaws 5. Du'LocREris, p. 506. 



Tliree gills ; gill-membranes free. Very small 



viUiform teeth in both jaws G. Crepidog aster, p. 507. 



Three gills and a half; gill-membranes free. 



Very small teeth in both jaws 7. TRACHEiiOCins.MUS, p. 509. 



Three gills and a half ; gill-mem'branes attached 



to the isthmus. Very small teeth in both 



jaws. Dorsal and anal fins with the rays 



well developed 8. Lepadogaster, p. 510. 



Three gills and a half. Dorsal and anal fins 



without distinct roys 9. Leptopterygius, p. 515. 



1. CHORISOCHISMUS. 



Gobiesox, sp., Cni\ lihgne Anim. 



Gobiesox, MilH. ^- I'rusch. Hur. IchtJn/ol. iii. p. 17 (not Laccp.). 



Chorisocliismii.s, Bn's. de Burnev. Rev. Zool. 1840, p. 209. 



Anterior part of the body very broad and depressed ; skin tougli, 

 naked. Dorsal fin short, situated on the tail ; ventrals widely apart 

 from each other, composed of a rudimentary spine and four (five) 

 rays ; posterior portion of the adhesive disk without free anterior 

 margin. Jaws with a series of large conical teeth in front, and 

 with broad bands of small ones behind tliis series. Gills tliree 

 and a half; pseudobranchiai ; branchiostegals five ; gill-membranes 

 attached to the isthmus. 



Cape Seas. 



1. Chorisochismus dentex. 



C}'cloptenas dentex. Pall. Sincil. vii. p. 6. tab. 1 ; Lacdp. ii. p. G4. 



T ifpadoga.gter dentex, Bl. Sc/m. p. 2. 



(Jobiesox dentex, Ciiv. licgne AnIm. ; Milll. ^- Troxch. I. c. 



gjTinus, Valenc. in Cuv. lityne Anim. III. I'oiss. pi. 108. fig. 1 



(very bad). 



nudus, Br is. de Barncv. I. c. p. 1 45. 



Chorisochismus nudus, Bris. de Barnev. I. c. p. 209. 



D. 10. A. 7. C. 10. V. 1/5*. 



Base of the pectoral without a vertical cutaneous fold ; tho 



* See, on the structure of the ventral fins, p. 493. 



